CAJ | 학술논문

冷加工316(Ti)不锈钢CW 316(Ti)SS是我国首选的快堆包壳材料,国产材料的常规力学性能与国外数据相当,但高温蠕变和高温持久强度数据却较低.本项研究主要是通过观察、比较国产快堆包壳材料和俄罗斯快堆包壳材料在高温下微观结构的变化情况,并结合对国产材料高温持久断裂试验样品的断口形貌观察结果,分析得出:国产材料长时高温力学性能下降的主要原因是沿晶界的σ相析出.
랭가공316(Ti)불수강CW 316(Ti)SS시아국수선적쾌퇴포각재료,국산재료적상규역학성능여국외수거상당,단고온연변화고온지구강도수거각교저.본항연구주요시통과관찰、비교국산쾌퇴포각재료화아라사쾌퇴포각재료재고온하미관결구적변화정황,병결합대국산재료고온지구단렬시험양품적단구형모관찰결과,분석득출:국산재료장시고온역학성능하강적주요원인시연정계적σ상석출.
Cold worked CW) 316(Ti)SS as cladding material used in fast reactor in China was developed. The normal mechanical properties of this material are comparable with the data in the literatures. However, high-temperature creep and rupture strength shows lower values. In order to get the micro-mechanism of this phenomena, the micro-structure of CW316(Ti)SS made in China and CH-68 (cladding material in fast reactor) from Russia at high temperatures were observed and compared. Moreover, the surface observation of CW316(Ti)SS after the rupture test was also conducted. Formation of σ phase on the grain boundary at high temperature was thought to be the main reason of the strength decrement.